Superheater for locomotives.



C. A. DWINELL. SUPBRHEATER POR- LOCOMOTIVES. APPLIBATION FILED 001215, 1907.

Patented DeaZ,y 1910.

2 SHEETS-SHEET 1.

C. A. DWINELL. SUPBRHEATER FOR LOGOMDTIVES.

APPLICATION FILED 0073.15, 190?.

4' PatentedDec. 27, 1910.

2 SHEETS-BHEBT 2.

. This type of engine frames, one pivoted to Unirnn STATES PATENT onricn.

ASSIGNMENTS, TO BALDWIN CHARLES A. DWINELL, OF PHILADELPHIA, `I.EJTISTSYLVAITIA, ASSIQNOB, BY MESNE LOCOMOTIVE WORKS, OF PHILADELPHIA, EEN'HSYL- 'VANI-A.,v A CORPORATION 0F PENNSYLVANIA."

SUPERHEATER FOB- LOCOMOTIVES.

cadeva.

Specification ot Letters Patent. Application tiled October 15, 1907. Serial No. 897,482.

Patented Dec. 27, 12910.

To all whom it may concern: y

Be it known that I, CHARLES A. Dwmnnn,

a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in .Superheaters for Locomotives, of which the following is a specication.

The object of my invention is to provide a. superheater for a locomotive of the type known as an articulated compound is provided with two the other with the high pressure cylinders on one frame and the low pressure cylinders on the other frame.

The locomotive boiler is rigidly secured to the rearframe and is adapted to-radially slide upon the forward frame.

By my invention I am enabled tomount the superheater in the smoke box of the locomotive, connecting one side of the superheater with the high pressure cylinder and the other side of the superheater with the low pressure cylinder.

In the accompanying drawings :-Figure 1, is a side view in dotted lines of an articulated Acompound locomotive showin the superheatingapparatus in full lines; ig. 2, is a plan view of Fig. 1 drawn in-the same manner; Fig. 3, is an enlarged sectional view showing an outline of a portion ofthe locomotive in dotted lines and the superheater and its connections in full lines; Fig. 4, 1s a section through the smoke box on the line 4 4, Fig. 3; tion.

A is the rear frame .of the locomotive and A is the forward frame of the locomotive, each having boxes for driving wheels a and a res tively. These two frames are pivote together at a2 by any suitable cong 5, is a view 'of a modificanect1on. U'13, B are the hi h pressure cylinders l' mounted rigidly on t rame A, and G, C are the low pressure cy idl on `the frame A. The high pressure cy 1ndeiS-B are connected by live 'steam i "es b to the steam dome d of the boiler l); this boiler is :mounted rigidly on the rear frame A and swings with linders mounted rigit. The. frontend of the boiler overhangsthe forward frame and has one or more saddles d which are arranged to slide upon supports a3 carried, by the said frame, so that the boiler is free to move radially over the or Ward frame in turning curves. u

d is the smoke box `of the boiler, and in this smoke box I place the-supcrheater E. This superheater can be of any form desired providing it does not interfere with the internal arrangement' of the smoke box.

In the present instance the superheater consists of two headers e, e at the lower end, and two 'headers e2 at the uppei` end connected together by a pipe et., The upper and' lower headers are connected by curved tubes e* arranged. on each side of the smoke box, as indicated in superheater is connected to the exhaust passage of the high pressure cylinders and the other sideof the superheater is connected to the steam inlet passage of the low pressure cylinders. l f A F is a transverse steam pipe coupled at each end to the exhaust passage 'b' of the high pressure cylinders B. This pipe is vconnected to a longitudinal pipe F extending to a fitting G containing two steam passages g, g. The pipe F is connected tothe lower end of the fitting and communicates with the passage g, and the upper end of this passage, is curved outward and' acts withva pipeH having a right angle cou pling h which is connected to the lower header c of the superheater E on one side of the smoke box. The several pipes are connected together by l make the connection between Ythe high pressur cylinders 'and the superheater steam tig t. i

It will be noticed that the series of pipes just alluded to above are all rigid, superheater is lmounted/in the smoke box of the locomotive boiler` which. isfrigidly secured to the frame A on which thec linde'rs B .are mounted, but the connection1 tween the superheatcr and the low'pressure cylinders C must be flexible so as to allow the for ward' trame to move independentl of the rear frame, and to accomplishthis extend the pipes connecting the superheater mtb Fig. 4. One side of the4 1 suitable joints so as to4 asthethepivotpoint .al possible.

' the low pressure cvlinder to apointas near a yoke' fitting I is a pipe on and this pipe is connected to the header e by a union z'. The pipe extends rearward and is connected to the curved member gf of Athe fitting 2G and this curved member conated at the forward endof'the frame A.

The pipe K isinade in tijizo sections vil: and

k; the section la' has an eiilprged portion k2 into which extends the end of the section lc and therezis a packing It? which prevents l .'leakage, yet allows the two parts la, lc of the pipe K to!- .telescope so as to accommodate the'independent movement) of the frame yA with thefram A. The rear end of the pipe K isin the form of a hollow ball n which rests in the socket 92 while the forward end n of the pipe Kris made in the form of a ball which rests iin the socket m on the yoke fitting M, so that when the two arms move independently this connection will allofw freedom of' movement and yet the pipes lwill be steam tight, preventing leakage at any point, as .each socket is provided with a packed joint.

`Aittached'to the opposite end 4ofthe pipe it' is a pipe K3 similar to ai@ pipe K2 adapted t'o a packed joint 'm2 forming a part of the fitting M and this pipe also has a ring las to hold it in place and allow itto freely swing. The connections may be slightly modified without departing from the main -f ature of the invention which is to place a s perheater in the smoke box of the boiler 1on the rear frame and couple it to cylinders on the` forward frame of the locomotive.

a Thus it will be seen that by the above de- .scribcd invention I am enabled to superheat the steam "after it passes from the high pressure cylinders and before it enters the low pressure cylinders in the type-of engine in which the low pressure cylinders are cai'- ried on a ffr'ame p ivoted to the frame carry' ing the high pressure cylinders.' Thus the .A steam enters the high pressure cylinders direct from =the dome of the locomotive boiler, escapes through the exhaust passage, enters the pipe F, passes through the pipe F', through section (1v of the fitting G, through the Apipe II to one side of the/superheater.

,The steam then passes around the superheater, escaping through the pipe I to the other arm g to the fitting Gr, then through the pipe K to the yoked fitting M, where the 'steam is divided, a portion going to the low pressure cylinders on one side of the locomotive. and the other portion going to the l h'e side of the locomotive opposite that on lwhich the pipe H -is placed lowpressure cylinders on the opposite sideY tofthis type of locomotive, in the present .instance through: the pipe C to' the nozzle C2 directly in the stack d3.'l

In some instances an opening may be made in the partition between the two passages of the fitting G and a valve g* .placed therein, as shown in Fig. 6 so that when it' is desired 'to cut out the superheater the valved passage can be opened to allowthe steam to pass directly. from the liigh pressure to the low pressure cylinders without passing throughthe superheater,

I dov not claim broadly a superheater mounted in the boiler structure of'an articu Ilated locomotive 'and flexibly connected to the cylinders, as this is Vset forth and claimed in an application for patent filed by Samuel M. Vauclain, on the twelfth day of December, 1908, under Serial No. 467,184.

l. The combination in an articulated locomotive of two frames pivotally connected, a boiler rigidly mounted on one frame and overhanging the other'frame, high pressure cylinders on the frame to which the boiler is rigidly secured, low pressure cylinders on the other frame, a superheater in the smoke box of the boiler, a fitting having two passageways, a pipeconnected to one end of the first passage-way and to the high pressure cylinders7 exhaust ports, a pipe connected to the other end of the first passageway and to one side of the superheater, a pipe connected to one end ofthe second passage-way and to theopposite side of the siiperheater, and a pipe made in sections connected to the other end of the second pas` sage-way by a ball and socket joint and to the low' pressure cylinders by a ball and socket joint, said sectional pipe having a telescopic joint interposed between the two ball and socket joints.

2. The-combination man articulated locomotive, of two frames pivotally connected,

perheater in the smoke box of the boiler, a'

vertically arranged fittingL having two 4passages therein and having two arms, one arm projecting on one'side ofthe locomotiveI 'and -tlie other on the opposite side, a pipe 'conf necting one of said arms with one side f the superheater, a pipe Iconnecting the other arm with the other side of thesuperheater, a cross pipe coupling the two exhaust ports of the high pressure cylinders with one of the said passages in the fitting, a yoked fit'- ting connected to the inlet passages of the In testimony whereof, I havev signed my low pressure cy11nders,-and n pipe Connect` name to this specification, 1n the presence lng snnl yoked fitting with one of the pasoi two subscrlblng Wltnesses.

sages of the first mentioned itting,said CHARLES A. DWINELL. 5 pipe having hulls at euch end adapted to \Vitnesses:

sockets in the said fitting and having a J. H. KERST,

telescopic section. R. H. SANFORD. 

